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NEET2015ChemistryChemical EquilibriumActual

aligned & If Ag ⁺+2 NH ₃ Ag ( NH ₃ )₂⁺ ; K₁=1.7 10^7 & Ag ⁺+ Cl ⁻ AgCl ; K₂=5.4 10^9 aligned Then, for AgCl +2 NH ₃ [ Ag ( NH ₃ )₂ ]⁺+ Cl ⁻ equilibrium constant will be

Options

  1. A4.68 10⁻³
  2. B5.2 10⁻¹⁷
  3. C0.31 10⁻²
  4. D3.1 10⁻²

Correct answer

C. 0.31 10⁻²

Step-by-step solution

For the given reaction, aligned Ag ⁺+2 NH ₃ Ag ( NH ₃ )₂⁺ ; K₁=1.7 10^7 Ag ⁺+ Cl ⁻ AgCl ; K₂=5.4 10^9 aligned Hence for aligned & AgCl Ag ⁺+ Cl ⁻ & K₂^ = 1 K₂ = 1 5.4 10^9 aligned Now for the reaction, AgCl +2 NH ₃ [ Ag ( NH ₃ )₂ ]⁺+ Cl ⁻ aligned K=K₁ K₂^ & =1.7 10^7 1 5.4 10^9 & =0.31 10⁻² aligned

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